﻿/*
 * Copyright (c) HiSilicon (Shanghai) Technologies Co., Ltd. 2023-2023. All rights reserved.
 */

#include "Channel.h"
#include "Modem/YModem.h"
#include "DataConvertor.h"

namespace {
    const int ACCUM_OFFSET = 8;
    const unsigned short CR_C16_TAB[] = {
        0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, 0x8108, 0x9129,
        0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef, 0x1231, 0x0210, 0x3273, 0x2252,
        0x52b5, 0x4294, 0x72f7, 0x62d6, 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c,
        0xf3ff, 0xe3de, 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
        0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d, 0x3653, 0x2672,
        0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4, 0xb75b, 0xa77a, 0x9719, 0x8738,
        0xf7df, 0xe7fe, 0xd79d, 0xc7bc, 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861,
        0x2802, 0x3823, 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
        0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12, 0xdbfd, 0xcbdc,
        0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a, 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5,
        0x2c22, 0x3c03, 0x0c60, 0x1c41, 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b,
        0x8d68, 0x9d49, 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
        0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78, 0x9188, 0x81a9,
        0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f, 0x1080, 0x00a1, 0x30c2, 0x20e3,
        0x5004, 0x4025, 0x7046, 0x6067, 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c,
        0xe37f, 0xf35e, 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
        0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d, 0x34e2, 0x24c3,
        0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, 0xa7db, 0xb7fa, 0x8799, 0x97b8,
        0xe75f, 0xf77e, 0xc71d, 0xd73c, 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676,
        0x4615, 0x5634, 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
        0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3, 0xcb7d, 0xdb5c,
        0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a, 0x4a75, 0x5a54, 0x6a37, 0x7a16,
        0x0af1, 0x1ad0, 0x2ab3, 0x3a92, 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b,
        0x9de8, 0x8dc9, 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
        0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8, 0x6e17, 0x7e36,
        0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0,
    };
    static const unsigned long CRC32_TABLE[] = {
        0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
        0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
        0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
        0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
        0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
        0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
        0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
        0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
        0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
        0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
        0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
        0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
        0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
        0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
        0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
        0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
        0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
        0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
        0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
        0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
        0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
        0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
        0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
        0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
        0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
        0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
        0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
        0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
        0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
        0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
        0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
        0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
        0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
        0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
        0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
        0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
        0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
        0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
        0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
        0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
        0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
        0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
        0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d };
}

ChannelClass::Channel::Channel()
{
}

ChannelClass::Channel::~Channel()
{
}

int ChannelClass::Channel::DecodeSEBootAck(const unsigned char *pSrcData, int srcDataLen,
                                           SEBOOT_ACK_FRAME &chlPktHead, int &resDataLen)
{
    if (pSrcData == nullptr) {
        return -1;
    }
    resDataLen = srcDataLen;
    const unsigned char *pData = pSrcData;
    while (resDataLen > 0) {
        if (static_cast<unsigned long long>(resDataLen) < sizeof(SEBOOT_ACK_FRAME)) {
            return DECODE_PACKET_PART;
        }

        SecureZeroMemory(&chlPktHead, sizeof(SEBOOT_ACK_FRAME));
        if (memcpy_s(reinterpret_cast<PBYTE>(&chlPktHead), sizeof(SEBOOT_ACK_FRAME),
                     pData, sizeof(SEBOOT_ACK_FRAME)) != 0) {
            resDataLen--;
            pData++;
            continue;
        }

        if (chlPktHead.startFlag != Global::chlStartFlag) {
            resDataLen--;
            pData++;
            continue;
        }

        if (chlPktHead.packetSize > sizeof(SEBOOT_ACK_FRAME) || chlPktHead.packetSize < sizeof(chlPktHead.checkSum)) {
            resDataLen--;
            pData++;
            continue;
        }

        if (resDataLen < chlPktHead.packetSize) {
            return DECODE_PACKET_PART;
        }

        if (SopCrc16(reinterpret_cast<PBYTE>(&chlPktHead),
                     chlPktHead.packetSize - sizeof(chlPktHead.checkSum)) != chlPktHead.checkSum) {
            resDataLen--;
            pData++;
            continue;
        } else {
            // 指针引用，函数内部分配空间，外部释放
            resDataLen -= chlPktHead.packetSize;
            return resDataLen > 0 ? DECODE_PACKET_MORE_THAN_ONE : DECODE_PACKET_SUCCSS;
        }
    }
    return DECODE_PACKET_ERROR;
}

int ChannelClass::Channel::DecodeYmodeHeadPacket(const unsigned char *pSrcData, int srcDataLen,
                                                 YMODE_START_END_PACKET &chlPktHead, int &resDataLen, U32 &packetSize)
{
    if (pSrcData == nullptr) {
        return -1;
    }
    resDataLen = srcDataLen;
    const unsigned char *pData = pSrcData;
    while (resDataLen > 0) {
        if (static_cast<unsigned long long>(resDataLen) < sizeof(YMODE_START_END_PACKET)) {
            return DECODE_PACKET_PART;
        }

        SecureZeroMemory(&chlPktHead, sizeof(YMODE_START_END_PACKET));
        if (memcpy_s(reinterpret_cast<PBYTE>(&chlPktHead), sizeof(YMODE_START_END_PACKET), pData,
            sizeof(YMODE_START_END_PACKET)) != 0) {
            resDataLen--;
            pData++;
            continue;
        }

        if (chlPktHead.flag != MODEM_SOH || chlPktHead.packetNum + chlPktHead.packetNumReserve != 0xff) {
            resDataLen--;
            pData++;
            continue;
        }
        U16 crc0Head = chlPktHead.crc[0] << 8; // 左移8
        U16 crc1Head = chlPktHead.crc[1];
        U16 crc = crc0Head + crc1Head;
        if (YModemClass::YModem::GetCrc(chlPktHead.data, sizeof(chlPktHead.data)) != crc) {
            resDataLen--;
            pData++;
            continue;
        }
        for (unsigned long long i = 0; i < sizeof(chlPktHead.data); i++) {
            if (chlPktHead.data[i] != 0) {
                continue;
            }
            if (i == sizeof(chlPktHead.data) - 1) {
                break;
            }
            QString strPacketLen = QString::fromLocal8Bit(reinterpret_cast<CHAR *>(&chlPktHead.data[i + 1]));
            packetSize = DataConvertor::Str2U32DecHex(strPacketLen);
            break;
        }

        resDataLen -= sizeof(YMODE_START_END_PACKET);
        return resDataLen > 0 ? DECODE_PACKET_MORE_THAN_ONE : DECODE_PACKET_SUCCSS;
    }
    return DECODE_PACKET_ERROR;
}

int ChannelClass::Channel::DecodeYmodeLargePacket(const unsigned char *pSrcData, int srcDataLen,
                                                  YMODE_INFO_PACKET_LARGE &chlPktHead, int &resDataLen)
{
    if (pSrcData == nullptr) {
        return -1;
    }
    resDataLen = srcDataLen;
    const unsigned char *pData = pSrcData;
    while (resDataLen > 0) {
        if (resDataLen < sizeof(YMODE_INFO_PACKET_LARGE)) {
            return DECODE_PACKET_PART;
        }
        SecureZeroMemory(&chlPktHead, sizeof(YMODE_INFO_PACKET_LARGE));
        if (memcpy_s(reinterpret_cast<PBYTE>(&chlPktHead), sizeof(YMODE_INFO_PACKET_LARGE), pData,
            sizeof(YMODE_INFO_PACKET_LARGE)) != 0) {
            resDataLen--;
            pData++;
            continue;
        }
        if (chlPktHead.flag != MODEM_STX) {
            resDataLen--;
            pData++;
            continue;
        }
        if (chlPktHead.packetNum + chlPktHead.packetNumReserve != 0xff) {
            pData++;
            resDataLen--;
            continue;
        }
        U16 crc0Large = chlPktHead.crc[0] << 8; // 左移8
        U16 crc1Large = chlPktHead.crc[1];
        U16 crc = crc0Large + crc1Large;
        if (SopCrc16(chlPktHead.data, sizeof(chlPktHead.data)) != crc) {
            resDataLen--;
            pData++;
            continue;
        } else {
            resDataLen -= sizeof(YMODE_INFO_PACKET_LARGE);
            return resDataLen > 0 ? DECODE_PACKET_MORE_THAN_ONE : DECODE_PACKET_SUCCSS;
        }
    }
    return DECODE_PACKET_ERROR;
}

int ChannelClass::Channel::DecodeYmode8KPacket(const unsigned char *pSrcData, int srcDataLen,
                                               YMODE_INFO_PACKET_8K &chlPktHead, int &resDataLen)
{
    if (pSrcData == nullptr) {
        return -1;
    }
    resDataLen = srcDataLen;
    const unsigned char *pData = pSrcData;
    while (resDataLen > 0) {
        if (resDataLen < sizeof(YMODE_INFO_PACKET_8K)) {
            return DECODE_PACKET_PART;
        }
        SecureZeroMemory(&chlPktHead, sizeof(YMODE_INFO_PACKET_8K));
        if (memcpy_s(reinterpret_cast<PBYTE>(&chlPktHead), sizeof(YMODE_INFO_PACKET_8K), pData,
            sizeof(YMODE_INFO_PACKET_8K)) != 0) {
            resDataLen--;
            pData++;
            continue;
        }
        if (chlPktHead.flag != MODEM_STXC) {
            resDataLen--;
            pData++;
            continue;
        }
        if (chlPktHead.packetNum + chlPktHead.packetNumReserve != 0xff) {
            pData++;
            resDataLen--;
            continue;
        }
        U16 crc08K = chlPktHead.crc[0] << 8; // 左移8
        U16 crc18K = chlPktHead.crc[1];
        U16 crc = crc08K + crc18K;
        if (ChannelClass::Channel::SopCrc16(chlPktHead.data, sizeof(chlPktHead.data)) != crc) {
            resDataLen--;
            pData++;
            continue;
        } else {
            resDataLen -= sizeof(YMODE_INFO_PACKET_8K);
            return resDataLen > 0 ? DECODE_PACKET_MORE_THAN_ONE : DECODE_PACKET_SUCCSS;
        }
    }
    return DECODE_PACKET_ERROR;
}

int ChannelClass::Channel::DecodeYmodeSmallPacket(const unsigned char *pSrcData, int srcDataLen,
                                                  YMODE_INFO_PACKET_SMALL &chlPktHead, int &resDataLen)
{
    if (pSrcData == nullptr) {
        return -1;
    }
    resDataLen = srcDataLen;
    const unsigned char *pData = pSrcData;
    while (resDataLen > 0) {
        if (resDataLen < sizeof(YMODE_INFO_PACKET_SMALL)) {
            return DECODE_PACKET_PART;
        }

        SecureZeroMemory(&chlPktHead, sizeof(YMODE_INFO_PACKET_SMALL));
        if (memcpy_s(reinterpret_cast<PBYTE>(&chlPktHead), sizeof(YMODE_INFO_PACKET_SMALL), pData,
            sizeof(YMODE_INFO_PACKET_SMALL)) != 0) {
            resDataLen--;
            pData++;
            continue;
        }

        if (chlPktHead.flag != MODEM_SOH) {
            resDataLen--;
            pData++;
            continue;
        }

        if (chlPktHead.packetNum + chlPktHead.packetNumReserve != 0xff) {
            resDataLen--;
            pData++;
            continue;
        }
        U16 crc1 = chlPktHead.crc[1];
        U16 crc0 = chlPktHead.crc[0] << 8; // 左移8
        U16 crc = crc0 + crc1;
        if (YModemClass::YModem::GetCrc(chlPktHead.data, sizeof(chlPktHead.data)) != crc) {
            resDataLen--;
            pData++;
            continue;
        } else {
            resDataLen -= sizeof(YMODE_INFO_PACKET_SMALL);
            return resDataLen > 0 ? DECODE_PACKET_MORE_THAN_ONE : DECODE_PACKET_SUCCSS;
        }
    }
    return DECODE_PACKET_ERROR;
}

unsigned char ChannelClass::Channel::CalcCheckSum(const unsigned char *pData, unsigned short len)
{
    unsigned short checkSum = 0;

    if ((pData != nullptr) && (len > 0) && len < 0xfffffff) {
        unsigned short i = 0;
        for (i = 0; i < len; i++) {
            checkSum += pData[i];
        }
    }
    return static_cast<unsigned char>(checkSum);
}

unsigned short ChannelClass::Channel::CalcCheckSumU16(const unsigned char *pData, int dataLen)
{
    unsigned int checkSum = 0;

    if ((pData != nullptr) && (dataLen > 0) && dataLen < 0xfffffff) {
        int i = 0;
        for (i = 0; i < dataLen; i++) {
            checkSum += pData[i];
        }
    }
    unsigned short checkSumShor = static_cast<unsigned short>(checkSum);
    return checkSumShor;
}

unsigned short ChannelClass::Channel::SopCrc16(const unsigned char *pData, UINT ulSize)
{
    unsigned short usCrc = 0;
    if (pData == nullptr || ulSize == 0) {
        return usCrc;
    }

    for (UINT i = 0; i < ulSize; i++) {
        usCrc = static_cast<unsigned short>(CR_C16_TAB[((usCrc >> 8) ^ (*pData++)) & 0xFF] ^ (usCrc << 8)); // 左移右移8
    }

    return usCrc;
}

int ChannelClass::Channel::GetYmodeSTX(int size)
{
    switch (size) {
        case MODEM_PACKET_SIZE:
            return MODEM_STX;
        case MODEM_PACKET_SIZEA:
            return MODEM_STXA;
        case MODEM_PACKET_SIZEB:
            return MODEM_STXB;
        case MODEM_PACKET_SIZEC:
            return MODEM_STXC;
        default:
            return MODEM_STX;
            break;
    }
}

uint32_t ChannelClass::Channel::Crc32Byte(uint32_t accum, uint8_t delta)
{
    return CRC32_TABLE[(accum ^ delta) & 0xff] ^ (accum >> ACCUM_OFFSET);
}
